Sewage and water clarifying tank



March 30,1926. v 1,523,691 7 I H. L. THACKWELL SEWAGE AND WATER GLARIFYING TANK Filed April 1,

1925 x2 Sheets-Sheet 1 Z5 1 Q [L H 2 Sheets-Sheet 2 1, MM M W/M 2 2 x Z; r/ .m w i5? March 30 1926.

H. L. THACKWELL SEWAGE AND WATER GLARIFYING TANK Flled April 16, 1925 I Patented Mar. 30, 1926. v I i v i Jum STATESTPATENT] orr c n iinnx 'rHAcKwELt, or" DALL S, TEXAS, AssIsnon OFONE-HALF '10- rnnn I a JONES, or DALLAS, TEXAS. 1

5 plates in superimposed orderwhereby they SEWAGE AND WATER cm nirxine TANK; V

Application filed April 16, 1925. SeriaL'No: 23,442.

To all whom it 'may'obnoemu u 'In thedrawings thefnumeral designates- Beit known' that I,' HENRY' L. THACK- an invertedvco-nical or pyramidal tank hay- WELL, citizenofthe United States of Amer'- ing'short vertical w'alls 11 at its'upper end .55. ca, residing at Dallas in'the county of Dalland-built of reinforcedconcrete or'any other? i 5 lasi'and State of Texas, have invented. cermaterial suitablefor the purpose. The tank).

tain new and useful Improvements in Sewat the intersection of its conical portion age and Water Clarifying Tanks, of which and its vertical-wall is shouldered to form the following is a specification. ian'annular gutter12, .fencedbyYaniupright 60 This invention relatesto new and useful metallic curbfi13 having a dependingapron z- 10 improvementsin sewage and water clarify- '14 extending below the shoulder; and bolted ingta-nks. 7 7 I or otherwisesecured to the tank wall." 1

The object of theinventio n is tosimplify ,Vertical guide walls or vanes 15 are built '7 andv reduce the expense of clarifying sewage radially; in the tank and have their edges and; water, by performing the functionsof 16jrounded and terminating 'shortJof-the-Q 15 sedimentation and filtrationpwith a single gutter to form a. flow moat 17 therebetweem unit and withoutthe ;use'of complex de'i- ,The inner vertical edges; l6. of thevanes vioes. Z v w a terminate in circular order to form'a cen Aparticular object of the invention is to tral well. A" circular platform 18 is built 7 spray or direct/radially and horizontally"on the vanes and supports a machinery the 'efiluenti -fromf the aeration tank, toward house 19 which-is reached by two-bridgeS,-. the center of the clarification tank, whereby 20 extending across the moat 17. 1 The plat-p the; velocity, is reduced; so that suspended form hasa central opening .18 at the top;

. solids aredeposited as sludge in theb-ottom of the well, the Wellbeingclosed by aof thetankgtogether with means for dicap 18. j. Z, recting the efiiuent toward the center of the Vertical slots-21 are :formed inthesides tank thus preventing wandering and indi-- of the vanes near the edges 16! and extend? rectcurrents. i 1 I Another object of the invention is to diplates 22 made of ffiltros or any other-suit-fl rec t the effluent horizontally againstthe' able filtering'material are superimposed in face of a vertically disposed'filtering column, these slots lo'ejt'ween the vanes and form. a whereby-more rapid and efficient filtrationyertical column surrounding" the well. The

is carried out Y and whereby the filtering'central opening-18 is larger ingdiameter f I column is more readily cleansed. :than the filtering column;so that the plates 3 A'further obj ectis to arrange, the filtering ,magvbeicleaned. with wire brushes if desired.

A ischargepipe 23 leads fromthe wellim may be readily placed and replaced and eco m'ediately'above the sludge level for conductnomically maintained, ing filtered eflfuent and includes agatezvalve" ;A construction designed to carry out the 24 having an operating rod 25 extending up invention will be' hereinafter described toto a stand 26 in the house19. The tank begether with other features of the invention. low the filter column'forms a sludge hopper.

The invention will he more readily under A sludge discharge pipe 27 extends axialstood from a reading of the following sp'ecily of the well and is'supported in. a ring-27" fication and by reference to the accompanyat the bottom thereof; and is connected to a 9 ing drawings, in which an example of' the lateral. discharge pipe 28 extending under I I invention is shown, and wherein: .7 the platform 18 and through the wallllm -Fig..1isa plan viewo'f atankconstructed An air com'presser 29 in the house vis con-fl in accordance with my invention, nected with an air receiver 30 from which a Fig. 2 is a partial vertical sectional view. pipe 31 leads and extends down .into the 9 i Fig. 3 is a vertical sectional view at right pipe 27 and terminates below the sludge i angles to Fig. Land level. This pipe'31 includes a valve 32. A

"Fig. 4: is a detail of the filter plate cleaning line 33 including a valve 34.;exmounting. V 1 1 tends from the pipe 31 through the cap into down to the sludgelevelline. .Arcuate filter the upper end of the filtering column for cleaning the plates. By means of the air lift the sludge is elevated in pipe 27 and dischargedthroughrpip e 28:

A sluiceextendslfromthe swall 11 tota weir 36 at a suitable aerator, by whichothe, efiiuent flows'to .theogutter 12., The curb has regularly spacedports' 37 at the vbottom of" the gutter entirely around the tank;

When used with the: aetiv'atedysludge, process the effluent from the aeration tanks (not shown) flows over the weir186, athroughL the sluice 35 to the gutter 12 which is thus filledf The efi luenth is 'disehz'rrged in radial streams: froml: theports 87 and directed across the moat 17 into the channels formed 'by the vanes 15; The effluent)is tlius di majority of finely suspended solids:w.ill be precipitated to the isludge hopper atthe bottom "of the tank. g Asthe fefliirent reaches the filter plates 22 it will be" filteredi therethrough intothe central well; The clear water-tro1n the welli is'drawnz Otf' through: the pipe 23, by+open* ing ther valve 24:. a The 'deposi ted sludg'e is pumped out bymeans of the air litt"(pipe 31') through the pi-pes '27 and 28-? A vertical overflow pipe 38- extends-from the pipe 2310 the wall l 1 immediately above the gutter '12 for relieving the: guttershouldthe liquid" e backi-up thereini dueto the clogging of the central well for any reason.

. Various chai'iges in the size-and shape'of thedifferent parts; as well as-modifications andfi alterations may be made Within the scope -ofr the appended elaimsr whatlrclaim is ,1. Ina sewage an'd water-plarifier;a tank 7 having a s-ludge' hopper-atits bottom; meansfor: directing the 'efiluent radially toward the center of th'e nil-11k, a filtering: barrier at the I centerg of the-tank, and a plea-r water-"well" withinithebarrier.= j

2; LIn a 1 sewage and water clarifier and filter; aetank: havinga sludge hopperg a fi l? I teringg' barrier disposed uprightly in -thetank, 'means :for supplying:- an effluent to w the 7 upperportion of thetank," and means located".betx'veen the supplyime'ans andi the b a rrierl 'for directing the effluent free from 'ob- StI'UQtlOH tmVflICl' the: barrier, the barrierbeing lfsufiicientlyi remote from the supply means to give the suspended isolids 'oppor tunity to precipitate in transit "therebetween.

3. In'a sewageand'water clarifier a tank havingca: sludge hopper at:.its:bottom and: provided with a gutter :around' its :upperpor I tion havingra durb vprovided: withi openings forfdischarging Jan etiluent into the tank 4; In sewage'fa-nd water olarifier, a tank having a sludge hopper at its bottom and provided with a gutter around its upper portion having a curb provided with-openings for: discharging an-t effluent; 'and meansfor directingJtherdischargedfeffiuent toward the center. ofthe tank. v

5. In a sewageand .water. clarifier, -atankt having asludge hopper at its bottom and" provided with' a gutter around its upper portion havinga; curb provided with openings for discharging an effluent, means for directingathe discharged effluent toward the center of the tank, and a filtering column at the center of the tank, p

6. In a sewage and water'clarifier; a'itank having a gutter at its upper endya vertical filteringrcol umn at the center of "thegtanh andvertical vanes radiating from the column. v p v p 7 In a'sewage andgwa'ter=clari fier, atankt having a gutter at its upper end;- aiper forated -curb' at the gutter, a Verti'Cal'v'filteri ng column at-th'e center ot the tanlg -and verri tical vanes radiating from the cOIumn toward the gutter. V I.

85 In a sewage= and water. clarifie:r,i a tank having a gutter at its upper i end, a perfo rated curb at'the gutter for directing r'ani efiluent into the tank, a yertical filtering: col;- umn at the center of the tank receivingthe effluent from the curb; means ton conduct ing the clear effluent from; the-filtering col umn, and means for conducting sludge'lfromiik thetank; g I

9: Ina sewage anda w-ater clarifier, a-tank havinga sludge hopperzzin its-bottomgi a gutter around the upper portionof the tank g a perforated curb contiguous :to the :gutter, central well in the column, filteriingibarriers' at the well, vertical vanes radiating fronm the well, and a platform supported: on the vanes.

10.- As a subeombinatioirin a sewageiand i water:*clarifie r, aztank; a plurality oftradi al-= vertical vanes inxthe'tanky and aplurality -ofi' filtering plates superimposedbetween the vanes :and forming a 1 column at the center of i .113 Meansrina clarifying andf fi lterin'g tank for radially directing the effluent fromfi an aerating tank toward a vertical filtering" column in 2 approximately direct radial 1ines-,- whereby fine suspended; solids are precipi tated and the effluent is prevei'ited 'fronrcirculating 12. The method 0 f clarifyin and filtering an etfluent, which cons-ists in: direotingithe'i efiluent at a -low velocity iir substanti ally straight horizontal lines-toward a -filtering barrier, whereby finely suspended solids are precipitated. I p

13. The method of clarifyingiand filtering an effluent, which consists #in: CliTetll'lg tli effluent at" a low velocity in: substantially straight horizontal lines toward a,filtering barrier, whereby finely suspended solids are tering barrier, Wherebythe finely Suspended precipitated, filtering the effluent through solids are precipitated, filtering'the efliuent' the barrier, and drawing oflt a clear liquid. through the barrier, drawing ofi a clear 10 14. The method of clarifying andfiltering liquid, and separately removing the precipi- T 5 an effluent which consists in radially direct-' tatedsludge. v

ing the effluent at a 10W velocityin substau- In testimony whereof I aflix my signature. tially straight horizontal lines toward a fil- HENRY L. THACKWELL, 

